Loom



June 13, 1944. v. PE'rRucloNE LooM.

2 shets-sheet 1 ,Filed Dec. 10, 1943 0 a.. KNK

wm kw June 13, 1944- v. P ETRUccloNE 2,351,364

LOOM

Filed Dec. lO, 1943 2 Sheets-Sheet 2 INVENTOR.

Y gade/m h/KM'ZMMS TroR/vzfw /Mwzo Patented June 13, 1944 LOOM Vincenzo Petruccione, Amsterdam, N. Y. 1

10, 194:3, Serial N0. 513,672

I Application December aclaims.' (ci. 139-123),

This invention relates to weft inserting mechanisms or needle motions foruse on looms, such as those of the Axminster type, in which the weft thread is carried through the shed by a needle and interlocked with a selvage cord passedthrough it by a shuttle, after which the inserted shot of weft is beaten up by a lay. More particularly, the invention is concerned with' a novel needle motion of the typeV referred to, which is superior to and oiersnumerousadvantages over prior similar mechanisms in that it is of simpler construction, so that it is lessexpensive to build and easier tolkeep in working orderand it-imparts to the needle a motion which is more nearly uniform with respect to both length of travel and speed. The new mechanism may be readily adjusted to vary the lengthof the path of travel of the needle and also to vary the speed at which the needle moves and, it may be installed without diicultyin existing looms as well as applied to new looms.

In Axminster looms as now commonly constructed, the needle is attached to a carriage movable along a rail at one side of the loom and the carriage is secured to a rope, which is led around a pair of pulleys at opposite -ends of the rail and has its ends wound yoppositely about and attached .to a drum. .The drum is mounted on an axle provided with a pinion, and by a suitable gear, such as a segment gear; meshing with the pinion and rocked by a crank on a shaft, the drum is rotated first inonedirection and then in the other. During.I such movement of the drum, the rope is ,moved back and forth along the rail and reciprocates .the needlevcarriage connected to it andzthe, needle Vmounted in the carriage. Such a needle motion is quite complex, because it includes a number of gears, shafts, pulleys, etc. and itis both costly to build and expensive to keep in repair. The needle motion described issubject to the further objection that, becauseof :slack or stretching of the rope or for other reasons, the needle does not always come to rest smoothly and in proper relation to the selvag'e shuttle, and this causes trouble in the interlocking of the selvage cord` with the inserted weft shot.

The present invention is directed to the provision of a needle motion vwhich overcomes the disadvantages ofthepri'orl needle motions and is simpler in'construction and superior in periormance. In the new motion, the needle is at-f tached to a carriagel movablealon'g a rail and connected toa'lever which is partof a'lazy'- tongs system of lversand lies at Vone end of the system. At the other end of the system, means are provided for extending and retracting the system and thereby moving the needle carriage back and forth along the rail and insertingl the needle into and withdrawing it from theshe'd. The mechanism also includes means limiting the travel of the needle in both directions and means for taking :up vslackintl'ie system so that the needle comes smoothly to-rest at oppositefends of a definite path 'of travel Without overrunning- For a better understanding of the invention, reference may be made'tothe accompanying drawings, in which Fig. 1 is a view in side elevation of the new needle motion showing the parts in the positions that they occupy when the needle is in retracted position; y

Fig. 2 is a view similar Fig. 1 showing the parts in the positions that they occupy when the needle is in advanced position;

Fig. 3 isa sectional view on the line 3-3 of Fig.1; M,

Fig. 41 is av sectional viewvon the line '4-4 of Fig. 2;.,andl Y Fig. 5 is a view in side elevation of a' modiflcation.- l 'f e The needle motion in the form illustrated in Fig. 1A includes a rail I0 provided with a metal facing strip II and mounted on uprights I2 at one side of the loom,`the rail lyingat right angles to the direction of the warp threads.v YA carriage is movable along the rail and it includes a plate I3 mounted on av shaft-I4 which serves as the axle of arroller I5 movable along the strip` II *and of another roller I 6,- which runs between upper and llower angle bars I1, I8 attached to brackets I9 connected to a rail 20 supported on the uprights I2 above rail I 0. The rail I0 is formed with a longitudinal slot 2| into which Va part ofy plate I3 extends and a needle 22 lies within the slot and isjconnected at one end lto the portion oi.y the plate within the slot. Y f -1 The needle carriage. is connected .to one end of a lever 23, which is an element of a lazytongs vsystem of vlevers and lies atrone end of the system. ,The other ven'd of lever 23 is connected to one end of` a lever 24 and the. midpoint of. lever 23 is connected toone end of a lever 25, the other end Ao1 ,which is connected to one end of a leverv 2li.A Levers 24 and 26 are pivotally `connectedat their lmidpoints and connected at their other ends to Aanother pair of levers 21 and 28 pivotally lcorinecteLat their midpoints and connected at their ends to an'- other pair of levers 29 and 3|! pivotally connected at their midpoints. Lever 29 has one end connected to a rocker arm 3| mounted for oscillation on a pivot 32 on one of the uprights I2 and lever 30 is connected at one end to part 33a of a scissors arm also pivotally mounted at 32. The scissors arm is made of two parts 33a, 33h secured rigidly together at 34 and at this point, the scissors arm is connected to one end of a spring 35 havingits other endr anchored` on the rail 20, the sprngtending to swing the scissors arm in a counterclockwise direction about pivot 32.

A shaft 36 driven by any suitable means is, mounted in suitable bearings 31 on a rail 33 extending between uprights l2 below the rail I and the shaft is provided with crank 39 having a lengthwise slot in which apin' Y151mljustably mounted. 'Ihe pin is connectedvbyarod 4| to one end of the rocker arm 3| and the rod 4| may be made in two parts connected by a`turn`buckle 42'so thatt'he length of the rod may be varied as desired.

YThe part Y331; of rthe scissors arm is formed at its lowerfend Vw'lth a 'slot 43 Yin which is adjustably mounted a pin 144. On this pin is pivotally mounted one end of 'a bar v45 formed at the other `end `with a slot 4Bin which is received ka pin 41 which'maybe'placedin one or the other Vof a number :of holes spaced along the rocker arm 3|. A

The movement of the needle carriage in one direction is limited `by a stop llmounted on rail l0, 'this stop v-havinga portion extending across the .top -of therailand'another portion extendi ing downy the Lrear surface of kthe railY and yattached to a bar 49 extending along thera'l rand movable in guides 50 secured to the rail. A spring is attached 'toene endofthe bar 49 and to a xed point on the rail. The carriage is Vformed at its rear 'end with a plate 52 Iand, at the limit of the retracted movement of the carriage, the plate 52 engages thestop '48,so that the carriage is brought gently to rest and verrunning -is avoided. l

In the operation of the needle motion of the construction described, the rocker and scissors arms lie substantially vertical, as shown in Fig. 1,' when the needle is in retracted position. As shaft 36-rotates,vcrank v39 acts through connecting rod 4| to swing the vrocker arm 3| vin a clockwise direction on 4its pivot 32 and such movement of ythe rocker varm causes the levers of thelazy-tongs to swing to expand vthe system and move the carriage and needle to the left. In such movement of thelevers of the system, the scissorsarm 33a, 33b'is moved clockwise on pivot V32 against the action of spring 35 and `the spring tends to take up any slack in the system that may be caused by wear.

When the crank 39'is substantially horizontal and extending to the right l(Fig. 2l), the lazycause the lazy-tongs lever system to be retracted and, during such movement of rocker arm 3|, scissors arm 33a, 33h moves counterclockwise to its initial position, assisted by the action of spring 35. At the end of its retraction, the needle carriage comes into contact with stop 48 and is brought smoothly to rest.

The pin 40 by which crank 39 is connected to connecting rod 4| is adjustable lengthwise of the slot in the crank and thev position of the pin determines the speedwth whichithe needle is moved. Adjustment of the length of travel of the needle and also the speed are further eftongs system is fully extended and the needle reaches the end of `itstravel through the shed. At this time, Vpirl 41 `onthe rocker arm reaches the end of'slot 46 in bar 45, so that further clockwise motion of scissorsarm 33a, 33D is prevented. The needle, accordingly, comes to rest without overrunning at a definite point at which the selvage shuttle may Ypass through the loop of weft thread carried by the needle and lock the inserted shot in place by vmeans of the selvage cord. As the crank moves pastv .the horizontal,

the rocker arm 3| vbegins to swing clockwise to fected by adjustment of pin 44 in slot 43 in the portion 33h of the scissors arm and by the location of pin 41 in one or the other of the openings along rocker arm 3|.

In the modified construction shown in Fig. 5, the needle carriage 53 is movable along a rail 54 supported on uprights 55 and is connected to a lever 56 at the end of a lazy-tongs system of levers, generally designated 51. The levers 58, 59 at the other'end of the system vare mounted on a pivot 60 `attached to one of the uprights and the ends of levers 58 and 59 are'connected tolevers 60, 6| which are 'pivotally connected at their midpoints 62. 'I'he pivotal connection between levers 60, Y6| is connected by a rod 63 to one end of a lever 64 mounted on a bar `65 extending between rail`54 and al lower rail 66 attached to uprights 55. The other end of lever 64 is connect-ed to Vaconnect'ing rod 61 which is in turn connected to'a pin -68 adjustably mounted 'in a slot 'in a crank v69 on a shaft 10 kdriven in 4any suitable 'manner and journaled in bearings on rail 66.

With the Fig. '5 construction, the rotation o1' shaft 10 causes lever v64 to ybe `swung on its pivot and the lever acts through rod |3 on the lazytongs system to cause the system to expand and contract. In the expanding 'movement of the system, the needle carriage is moved along rail 54 to advance 'the needle through the shed and when :the lazy-tongs system is contracted, .the

carriage returns to move .the needle out of the shed.

1. In aloom, the combination of a needle movable into and vout of the shed, a lazy-tongs sys- `tem of levers including Yan element at one end connected to the needle and a rocker arm ,and a scissors arm at the other end pivotally mounted on the same pivot, oscillation of the arms in opposite directions about the. pivot causing extension and retraction of the system and corresponding movements of the needle, and means ior oscillating `said arms.`

2. In a loom, the .combination of a needle movable intoand out of the shed, a lazy-tongs system of llevers including an element at one end connected to the needle and a rocker arm and a scissors arm at the other end Vpivotally mounted `on the same pivot, oscillation of the arms in opposite directions about `the `pivot causing extension and retraction of the ysystemand corresponding movements of the needle, a stop limiting the retractile movement of the needle,`and means for oscillating said arms.

3. In a loom, the combinationof a needle movable into and out of the shed, alazgy-tongs system o f levers including an element at one end connected to the needle and a rocker arm and a scissors Varm rat the other endvpivotally mounted on the samepivot, oscillation of the arms in oppogsite directions about the pivot causing extension and retraction of the system and corresponding movements of the needle, and means for oscillating said arms in opposite directions, including a shaft having a crank and a rod connecting the crank and the rocker arm.

4, In a loom, the combination of a needle movable into and out of the shed, a lazy-tongs system of levers including an element at one end connected to the needle and a rocker arm and a scissors arm at the other end pivotally mounted on the same pivot, oscillation of the arms in opposite directions about the pivot causing extension and retraction of the system and corresponding movements of the needle, means for oscillating the arms in opposite directions on their pivot including a shaft having a crank, and a rod connecting the crank and the rocker arm, a connection between the rocker arm and the scissors arm by which oscillation of the scissors arm in one direction about said pivot is limited, and means acting on the scissors arm to move it in the opposite direction about the pivot.

5. In a loom, the combination of a needle movable into and out of the shed, a lazy-tongs system of levers including an element at one end connected to the needle and a rocker arm and a scissors arm at the other end pivotally mounted on the same pivot, oscillation of the arms in opposite directions about the pivot causing extension and retraction of the system and corresponding movements of the needle, a stop limiting the retractile movement of the needle, a shaft having a crank, a rod connecting the crank to the rocker arm, and a spring acting on the scissors arm and tending to swing it in one direction about its pivot.

6. In a loom, the combination of a needle movable into and out of the shed, a lazy-tongs system of levers including an element at one end connected to the needle and a rocker arm and a scissors arm at the other end pivotally mounted on the same pivot, oscillation of the arms in opposite directions about the pivot causing extension and retraction of the system and corresponding movements of the needle, a stop limiting the retractile movement of the needle, means for oscillating said arms in opposite directions on their pivot, including a shaft having a crank, a rod connecting the crank and rocker arm, and a spring acting on the scissors arm and tending to swing it in one direction on its pivot, and a bar pivoted on one arm and having a slot and pin connection with the other arm, said bar acting to limit the movement of the scissors arm in the other direction on its pivot.

7. In a loom, the combination of a track, a carriage movable along the track on a roller, a needle secured to the carriage, a lazy-tongs system of levers including an element at one end connected to the carriage and a rocker arm and a scissors arm at the other end pivotally mounted on the same pivot, oscillation of the arms in opposite directions about the pivot causing extension and retraction of the system and corresponding movements of the needle and carriage, means for oscillating said arms, including a shaft having a crank, and a rod connecting the crank to the rocker arm, a bar connected to the scissors arm and to the rocker arm and limiting the movement of the scissors arm in one direction on its pivot, and means acting on the scissors arm and tending to move it in the other direction on its pivot.

8. In a loom, the combination of a track, a carriage movable along the track on a roller, a needle secured to the carriage, a lazy-tongs system of levers including an element at one end connected to the carriage and a rocker arm and a scissors arm at the other end pivotally mounted on the same pivot, oscillation of the arms in opposite directions about the pivot causing extension and retraction of the system and corresponding movements of the needle and carriage, means for oscillating said arms, including a shaft having a crank, and a rod connecting the crank to the rocker arm, a bar pivotally mounted on one arm and connected to the other arm by a slot and pin connection, the bar limiting the movement of the scissors arm in one direction on its pivot, and means acting on the scissors arm and tending to move it in the other direction on its pivot.

9. In a loom, the combination of a track, a carriage movable along the track, a needle attached to the carriage and movable into and out of the shed as the carriage moves back and forth along the track, a lazy-tongs system of levers, including an element at one end connected to the carriage and a rocker arm and a scissors arm at the other end pivotally mounted on the same pivot, oscillation of the arms in opposite directions about the pivot causing extension and retraction of the system and corresponding movements of the carriage and needle, a shaft having a crank, a rod connecting the crank and rocker arm, the shaft acting through the rod to oscillate the rocker arm about its pivot in opposite directions, the scissors arm being swung oppositely to the rocker arm by the action of the rocker arm on the system, by which the movement of the scissors arm in one direction is limited, and a spring acting on and tending to swing it in the opposite direction.

VINCENZO PETRUCCIONE. 

